package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void insertEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //默认密码进行md5加密存入数据库
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);
        //创建时间，修改时间，创建人，修改人，这里采用AOP自动填充公共字段

        employeeMapper.insertEmployee(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //设置分页参数（是否引入分页插件依赖）
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        //执行分页查询 select * from employee where name like concat ('%',#{name},'%')
        List<Employee> employeeList = employeeMapper.selectEmployees(employeePageQueryDTO.getName());
        //获取分页结果
        Page<Employee> employees = (Page<Employee>) employeeList;
        //封装PageResult
        long total = employees.getTotal();
        List<Employee> records = employees.getResult();
        return new PageResult(total, records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void updateStatusById(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.updateEmployee(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getEmployeeById(Long id) {
        Employee employee = employeeMapper.getEmployeeById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmployeeById(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        //修改时间,修改人,这里采用AOP自动填充公共字段
        //重用动态修改方法
        employeeMapper.updateEmployee(employee);
    }

    /**
     * 修改密码
     * @param passwordEditDTO
     */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        //1.获取新密码和旧密码
        String oldPassword = passwordEditDTO.getOldPassword();
        String newPassword = passwordEditDTO.getNewPassword();

        //2.获取当前登录员工id,并根据员工id查询数据库获取密码
        Long empId = BaseContext.getCurrentId();
        Employee emp = employeeMapper.getEmployeeById(empId);
        //3.判断输入的旧密码是否正确
        if (!emp.getPassword().equals(DigestUtils.md5DigestAsHex(oldPassword.getBytes()))) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        //4.将新密码进行MD5加密
        newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());

        //5.构造employee对象
        Employee employee = Employee.builder()
                .id(empId)
                .password(newPassword)
                .build();

        //6.调用mapper更新方法，修改员工密码
        employeeMapper.updateEmployee(employee);
    }

}
